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Massdrop x THX AAA™ 789 Linear Amplifier - Impressions Thread

Discussion in 'Headphone Amps (full-size)' started by XERO1, Mar 1, 2018.
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  1. alpovs
    English Alphabet: A B C D E F G H I J K L M N O P Q R S T U V W X Y Z

    You decide.
  2. alpovs
    Typos on production labels? Not impossible but unlikely. March 2018 was when they started taking orders for this amp. Check the first page of this thread.
  3. deafenears
    BF vs. BJ might even be initials, maybe names? Benjamin Franklin vs. Brad Jones, or Build Job vs. Build Farm? With the numbers denoting the year. This would certainly match up. Feel like opening both up and taking snapshots of the circuit board? There might even be revision numbers/letters on it.

    Still, doesn't really make sense that they've started taking orders in March 2018 and have production units already made then? If so, why the few months lead time for those to go out?

    @CEE TEE, maybe you can comment?
    Last edited: Sep 11, 2019
    alpovs likes this.
  4. RestlessZombi
    I was thinking that maybe they just started again with the numbers after SKU "MDX-19090-2" so then Model numbers would start again at BA01, for example, but mine is from the April Drop and its the same details (SKU no. MDX-19090-2, Prod No. BF19 and AW Rev.A 03/2018) as yours except has a lower serial (024XX), so likely they didn't. Proves its not a typo though :)
    alpovs likes this.
  5. RestlessZombi
    This is just what I did a week or so back .. :)

    SKU no. MDX-19090-2, Prod No. BF19 and AW Rev.A 03/2018 Serial No. 024XX from the April drop. Says "D1" but thats about it.

    789-1.jpg 789-2.jpg

    Not as much in there as i hoped.. but well built :)
    Last edited: Sep 11, 2019
    alpovs likes this.
  6. chungjun
    Thanks for the English lesson. I was talking about the numbers at the end though... (BF19 vs BJ18)

    1 2 3 4 5 6 7 8 9...
    Last edited: Sep 11, 2019
    alpovs likes this.
  7. ls13coco
    What other amps do you use? Curious as I intend on getting the Empy eventually. The 789 doesn't seem cleaner at high volumes in anyway?

    p.s I prefer my MCTH to the 789 90% of the time
  8. alpovs
    Ahh... Sorry! You underlined the numbers but I didn't notice it probably because my F and J letter were in bold.

    Actually it makes sense. 8 - 2018, 9 - 2019. And the letters may indicate the plant as someone noted earlier.
    Last edited: Sep 11, 2019
    chungjun likes this.
  9. alpovs
    I think I will do it at some point when my curiosity wins over my laziness.
    I think the AW 03/2018 indicates board/schematic design revision. They might have had just a few units by then.
  10. Th3Drizzl3
    i also own a jot. as well as a lyr 3 and a slew of other amps. also some china ones and a few i made myself.
  11. FireLion
    The SDAC-B also goes great with LCX. The combo version has the lowest gain, a D10 is louder and the SDAC-B is louder again. The SE was even driving a T50RP to adequate levels.

    I have a Jot on the way for this week and have a xDuoo TA-10 I'd like to sell as I have two.

    Anyway since this is a 789 thread the little SDAC-B is an impressive little unit, has some brightness but has good layering.
  12. Joong
    It is too simple to pay 400USD.
    I might wait until deeee...ep DROP.
  13. JinTam
    I have a Woo Audio WA6 2nd gen with SE 274B and 12SN7, Cayin HA-1A, and the THX. I think my favorite is the WA6 with both the Utopia end Empy.
  14. ayang02
    There will be a Monoprice THX AAA 887 available in October. This looks like a direct 789 clone with better distortion and noise measurements, looks like a good option for those who are still looking for a 789 amp.
    trellus likes this.
  15. bequietjk
    Unless Neurochrome or Emotiva come out with a head-amp in the same price bracket soon, it's either gonna be the THX 887 or the Asgard 3 for me. @ayang02 Thanks! Had no idea Monoprice was coming out with such a gem. I saw the specs on ASR.
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